Guide block, pulley block and the like



Jan. 17, 1933. M.,vAN DER scHANs ET AL 1,894,286

GUIDE BIJOCK, PULLEY BLOCK, AND THE lLIKE Filed Jan. 1s, 19:51v

gnu/enfans' Patented Jan. 17, 1933 UNITED STATES orner! f ivIvA'rrurrisat` vnr :pm scHANs, or KnIMPnN-oiv-THEJJssnL, AND GEBR-1T HILGERS, or nom'rnnpnivr, NETHEnLANDs, AssIeNoRs 'ro THE FIRM or WED. c. srivrs,V or KRIMPEN-oN-Tnn-Lnx, sourir-HOLLAND, NETHERMNDS, 'ancrer-r1 FIRM GUIDE BLocx, rULLnY BLOCK Alvin THE 1.11m l Application filed January 13, 1931, Seria1,No.-r508,4r74, and in the'Netherlands September 16, 1930. y

This invention relates to guide andv snatch blocks, pulley blocks and the like, such asl are widely used for guiding ropes, chains and similar drawing means, as in block `and tackle gear and for loading ropes', chains and the like round corners, and sometimes referred to as leading or quarter blocks. i In the ordinary pulley block, the axle yo f the pulley is carried by a stirrup or sheave' at the sides of which project two protecting plates. These plates are provided for the purpose of guiding and protecting the rope sothat it cannot spring off the pulley, and in addition they are a protectionhfor persons inthe neighbourhood ofthe pulley block, because .ropes which are moving at high speed over pulleys may form a very real danger to persons standing by.V In some cases, also, the said stirrup orsheave carries, in addition, a suitable fastening device, generallya turnable hook which isk arranged at right angles to the median line of they pulley axle andby means of which the pulley block can be fixed up ,n-any desired manner.

' The rope is thus quite enclosed in the pulley block, i. e. in the working position it cannot be taken out sideways from the pulley. This isv essential in order to ensure astrong construction as well as to avoid the danger vof the rope springingoutwards. As a ,con-

sequence, a device must be provided which permits, as circumsta-nces require, the sideways insertion or removal of the rope. `In the usual constructional form, the ypulley block has for this purpose a hingedgpart'embodied in the she'avel or stirrup', which part can be turned open and bolted in any manner whatever in closed position. This construction has the disadvantage which all severely and unequally loaded hinges generally eX- -hibit, namely, severe wear, anda gradual tendency for theVv connection to become looser. The whole construction thus soon loses its rigidity. Such. blocks, moreover, soon `assume crooked or oblique positions and there then arises an unfavourable .loading of the parts, greater rubbing of the rope, and consequently still more severe wear, andl there p is also adanger of the' rope runnng .out of the pulleyv or roller. The hinged parts' also frequently become loose during the operation, and the rope can then spring outwards. Thusthei'r A`use is accompanied by greater danger to the bystander. y

'TheA object of the' present invention is to provide a guide and snatch block, pulley blockv or' the like whereby.y these drawbacks are obviated and a strong and permanently efficient construction is obtained.

According a` al@ invention a.' guide 1010er', ,v

pulley block or the like is provided in which a member or device adapted to carry a hook or other attachmentmeans is turnabl'y' and slidably or otherwise movably arranged on a supportingfor guiding part at one` side of'a whilst ready insertion and 'removal of a rope or lthe like in the guide `block or the like is permitted, the supporting parts can be made as a single unit: or Whole'. e

Preferably the turnable and slidable member carrying the hookijs arranged on ay bolt or other-element provided'in the supporting vor guide part at one side ofthe pulley or guide member, the said bolt or element passing through a lengthwise slot/in the said member.

It is also preferable that the member carrying the hook be supportedin its working ppsitionequally by the'supjporting or guiding parts at both sidesof the pulley orguide member. f k

AL; pulley block embodying the ,invention will now be described, by way of example,

Withreference to theanneXed drawing,` in

Wheh:#, A l v Figs. l and 2 show respectivelyA a front View andv a side view` of the pulley block.

Figs. 3,- 4: and 5 show further details ofthe invention. y

\ 'We'may nowproceed with a description of the invention, due reference beingv had to the drawing.

' The pulley 1 is rotatably mounted'v on an axle formed by a' bolt 2 which is carried by atwoart or bifurcated slieave 3.v On vthe inner side of the sheave 3, two, protecting plates 4', 5 are preferably arranged, these plates projecting over the edge of the pulley 1. Y One part of the sheave 3 is extended to form two bearing supports 6, 7 through which projects a bolt 8. Between the two bearing supports, an 'intermediate latch member9`is swingably mounted which carries a turnable hook 10 and which at the place where the bolt 8 passes through is provided with a lengthwise slot 11. Y This slot 11 has at the end on the side of the hoolr 10 acircular portion in which the body of the bolt 8 pivotally moves. rlhe other portion ot the slot 11 is narrower and in correspondence therewith a bolt 8 is provided in its middle with a flat portion lrwhich is conformed to the width of this narrower portion of the slot 11, and also in length as well, so that the bolt I8 can enter it, although only Vin a predeterminedposition. lFor preventing turning of the bolt 8 in the bearing supports 6 and 7, it is provided with a screw locking device as indicated by 16. The end ot the member 9 which is remote from the end of thehook 10 extends through the slot 12 of the other part of the sheave 3 and is provided with a nose 13. It the member 9 is pressed' in the direction of the pulley 1, which can be done in virtue of the slots 11 and 12, the nose 13 isi'reed from the end of the sheave and can be with;- y

drawn through the slot 12 by turning the member 9 with the circular portion ot the slot 11 on the bolt 8. The member 9 is in this case moved through a slot 14 which is provided between the two bearing supports 6, 7 and after being turned, the member 9 cannot slide any more on the bolt 8, as this can only enter the narrower portion of the slot 11 in one position. The rope can then be pushed in between the parts ot the sheave. After` the f member 9 has been again brought into the working position, it is pushed in the opposite direction from that above mentioned, in which movement it is assisted by the pull of the rope, and which movement cannot take place, dueto the shape of the slot'11, unless the nose 13 has'passed through'the slot 12. The block thereupon again` YconstitutesV a closed unit. VIt must be considered in this connection that the part 9 is so` constructed that in the working position it -isborne equally by the bolt 8 an-d by the edge of the slot 12, and in this manner the load is distributed uniformly in both parts ot"l the sheave, and thus a symmetrical loadingis obtained. j

The invention is not limited to pulley blocks but can also be applied to'any other similar devices.

By the use Aot' the invention, the block or lshe'ave doesnot need to be divided into two parts, but can be kept as a, single unitor whole, and throughout the movement'ofithe member or part provided with the hook, -conf member engageable by said latch member to provide va closure for said snatch block, whereby to retain a rope association with said pulle and means foreifecting locking engagement of said latch-member with said other block member.

Y 2. A snatch block including the combination, with a pair 'ot Vcorresponding Vblock 'members havinga pulley rotatably mounted between the same, 'of a projection disposed upon one of said block members, a latch meinbei having a suspension meansfand pivoted to said projection in a positionrendering the same swingable about an axis transverseto the axis of said pulley, there Abeing means associated with the other block member for retaining said latch member in locked rela-y tion with said other block member `to provide a closure for said snatch'block, whereby Y rfiv rendering the same swin able about-an axis transverse to the axis ,o said pulley, there being a slot in the other block member engageable by said latch member toprovide aclosure for said snatch block, whereby to retain a rope in association with said pu1ley,; nand means for effecting locking engagement i of said latch member with said other block `member. c

4. A snatch block including the combination, with a pair of corresponding block members havingva pulleyv rotatably mounted between the same, of a pair of cheeks disposed upon one ot said block members, there bei-ng'corresponding slots in said cheeks, a

latch member mounted between said cheeks having a suspension means and provided i with pivotmeans located in said correspond- `ing slots so as to ren-der said'latch member movable in limited manner between the cheeksand swingable about an Vaxis transs.

verse tothe axis of said pulley, therebeing leo' "es y also a slot in the other block member engage- 'able by said latch member to provide aclosure for said snatch block, whereby to retain a rope in association with said pulley, and means for eecting locking engagement of said latch'member with said other block member.

5. A snatch block including the combination, with a pair` of corresponding block members having a pulley rotatably mounted between the same, of a pair of cheeks disposed upon one of said block members, having pivot means between them, a latch member mounted between said cheeks having a suspension means and provided with a slot, in which the said pivot means is located so as to render said latch member movable in limited manner between the cheeks and swingable about an axis transverse tothe axis of said pulley, there being also a slot in the other block member engageable by said latch member to provide a closure for said snatch block, whereby to retain a rope in association with said pulley, and means for el'ecting locking engagement of said latch member with said other block member.

In testimony whereof, we aiiiX oui` signatures.

MARTIEN vAN DER SCHANS. GERRIT HILGERS. 

